// JavaScript Document
// Begin description hider code 
      var state = 'none';
      
      function showhide(layer_ref) {
      
      if (state == 'block') {
      state = 'none';
      }
      else {
      state = 'block';
      }
      if (document.all) { //IS IE 4 or 5 (or 6 beta)
      eval( "document.all." + layer_ref + ".style.display = state");
      }
      if (document.layers) { //IS NETSCAPE 4 or below
      document.layers[layer_ref].display = state;
      }
      if (document.getElementById &&!document.all) {
      hza = document.getElementById(layer_ref);
      hza.style.display = state;
      }
      }
// End Description Hider Code 